Sep 18

Sep 18 - Sep 20

San Diego Bayfair

INB-UNL

Mission Bay/ Fiesta Bay

San Diego, CA

Sep 19

Sep 19 - Sep 20

Mecosta County Regatta

SO-J CLSES

Muskegon River

Big Rapids, MI

Sep 19 - Sep 20

Vintage Thunder

SE-VINTAGE

Ohio River

Madison , IN

Sep 19 - Sep 20

Crystal Lake Regatta 2026

SE-PRO-MOD-SO-J CLSES

Crystal Lake

Redwood, NY

Sep 26

Sep 26 - Sep 27

18th Annual Steve Noury Kingston...

PRO-MOD-SO-J CLSES

Greenwood Pond

Kingston, NH

Sep 26 - Sep 27

Brewster Thunderfest Featuring T...

VINTAGE-INB-OPC

Columbia River

Brewster, WA

Sep 26 - Sep 27

Lake Lawrence World Record Regat...

PRO-KPH-MOD-SO-J CLSES

Lake Lawrence

Yelm, WA

Sep 26 - Sep 27

Xinsurance Clearwater Offshore N...

OS

Gulf of America

CLEARWATER BEACH, FL

Sep 26 - Sep 27

New Jersey State Championships /...

INB

Lake Hopatcong

Landing, NJ

Sep 26 - Sep 27

Hurricane on the Chain

PRO-MOD-SO-J CLSES

Lake Marie

Antioch, IL

Sep 26 - Sep 27

RegattaFest

OPC-J CLSES

Ohio River

New Martinsville, WV

Oct 2

Oct 2 - Oct 4

Mahogany & Merlot

VINTAGE

LAKE CHELAN

CHELAN, WA

Oct 3

Oct 3 - Oct 4

Fall Wilson Shootout & Marathon

PRO-MOD-SO-J CLSES

Buckhorn Reservoir

Wilson, NC

Oct 3 - Oct 4

Hydrobowl - Caesars Creek

INB

Caesars Creek

Waynesville, Ohio , OH

Oct 3 - Oct 4

2026 Lake Ming Shoot Out Stock O...

INB-MOD-SO-J CLSES

Lake Ming

Bakersfield, CA

Oct 3

ASBR Pro Racing Series Race #6

JET SPRI

ECMX Park

Lewiston, ID

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Modified Outboard Menu

Modified Outboard

Modified-Outboard

MOD racers aren't afraid to get their hands dirty - The goal in this category is to pull every last bit of horsepower out of your engine. In Modified Outboard, the engine builder's skill is just as important as the driver's. These boats are easily recognizable by their specially tuned pipes that make them as loud as they are fast. Because engines are constantly being modified to make the absolute most of what the rules allow, the competition is always fierce. Join the ranks of some of the best engine builders in the world, join Modified Outboard Racing.

Whether hydroplane or runabout, Modified classes are defined by the size of their engines (displacement). The numbers in the class names give you the approximate engine size in cubic centimeters. The 250ccMH, or 250 cubic centimeter Mod Hydro, is smaller than the 850ccMH, or 850 cubic centimeter Mod Hydro. Some classes have minimum weights, which increase with engine size. The smaller classes are often a good fit for younger, lighter drivers (14-year-olds may drive 200-250cc Mod classes, for example). The larger classes take considerable skill and experience. Propellers of four blades or less are used, and your prop choice can affect your speed enormously.

Modified Outboard Resources

Modified Outboard Classes